Gilles Sylvain, Ismino R., Sanchez H., David F., Nunez Rodriguez Jesus, Dugué Rémi, Darias Maria Jose, Römer U. (2014). An integrated closed system for fish-plankton aquaculture in Amazonian fresh water. In :
Dumont B. (ed.), Bernués A. (ed.). Agroecology : integrating animals in agroecosystems. Animal : An International Journal of Animal Bioscience, 8 (8), p. 1319-1328. ISSN 1751-7311.
Titre du document
An integrated closed system for fish-plankton aquaculture in Amazonian fresh water
Année de publication
2014
Auteurs
Gilles Sylvain, Ismino R., Sanchez H., David F., Nunez Rodriguez Jesus, Dugué Rémi, Darias Maria Jose, Römer U.
In
Dumont B. (ed.), Bernués A. (ed.), Agroecology : integrating animals in agroecosystems
Source
Animal : An International Journal of Animal Bioscience, 2014,
8 (8), p. 1319-1328 ISSN 1751-7311
A prototype of an integrated closed system for fish-plankton aquaculture was developed in Iquitos (Peruvian Amazonia) in order to cultivate the Tiger Catfish, Pseudoplatystoma punctifer (Castelnau, 1855). This freshwater recirculating system consisted of two linked sewage tanks with an intensive rearing unit (a cage) for P. punctifer placed in the first, and with a fish-plankton trophic chain replacing the filters commonly used in clear water closed systems. Detritivorous and zooplanktivorous fishes (Loricariidae and Cichlidae), maintained without external feeding in the sewage volume, mineralized organic matter and permitted the stabilization of the phytoplankton biomass. Water exchange and organic waste discharge were not necessary. In this paper we describe the processes undertaken to equilibrate this ecosystem: first the elimination of an un-adapted spiny alga, Golenkinia sp., whose proliferation was favored by the presence of a small rotifer, Trichocerca sp., and second the control of this rotifer proliferation via the introduction of two cichlid species, Acaronia nassa Heckel, 1840 and Satanoperca jurupari Heckel, 1840, in the sewage part. This favored some development of the green algae Nannochloris sp. and Chlorella sp. At that time we took the opportunity to begin a 3-month rearing test of P. punctifer. The mean specific growth rate and feed conversion ratio (FCR) of P. punctifer were 1.43 and 1.27, respectively, and the global FCR, including fish in the sewage part, was 1.08. This system has proven to be suitable for growing P. punctifer juveniles out to adult, and provides several practical advantages compared with traditional recirculating clear water systems, which use a combination of mechanical and biological filters and require periodic waste removal, leading to water and organic matter losses.
Descripteurs
AQUACULTURE ; POISSON D'EAU DOUCE ; METHODOLOGIE ; RELATION TROPHIQUE ; FONCTIONNEMENT DE L'ECOSYSTEME ; PHYTOPLANCTON ; RECYCLAGE DES DECHETS ; AZOTE ; PRODUCTIVITE ; POISSON CHAT
Description Géographique
AMAZONIE ; PEROU
Localisation
Fonds IRD [F B010062834]
Identifiant IRD
fdi:010062834
